A224198 Number of n X n 0..3 arrays with rows unimodal and antidiagonals nondecreasing.

4, 160, 16060, 2411246, 451319098, 96914926654, 22835261226043, 5750097317505437, 1521786116504544601, 418628292901694453231, 118789461093773656747975, 34580941641153629118242103

Offset

1,1

Comments

Diagonal of A224204.

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

Some solutions for n=3
..1..3..3....1..0..0....3..0..0....0..3..1....1..1..1....1..3..1....0..0..1
..3..3..1....1..0..0....1..1..1....3..2..1....3..1..0....3..2..0....3..2..1
..3..2..0....0..3..2....1..1..2....3..2..2....2..3..0....3..3..1....2..3..1

Crossrefs

Cf. A224204.

Sequence in context: A264568 A224044 A224275 * A104133 A214007 A248330

Adjacent sequences: A224195 A224196 A224197 * A224199 A224200 A224201

Keyword

nonn

Author

R. H. Hardin, Apr 01 2013

Status

approved